package cn.wolfcode.luowowo.website.resolver;

import cn.wolfcode.luowowo.cache.service.IUserInfoRedisService;
import cn.wolfcode.luowowo.member.domain.UserInfo;
import cn.wolfcode.luowowo.website.annotion.UserParam;
import cn.wolfcode.luowowo.website.util.CookieUtil;
import com.alibaba.dubbo.config.annotation.Reference;
import org.springframework.core.MethodParameter;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//自定义参数解析器
public class UserInfoArgumentResolver implements HandlerMethodArgumentResolver {
    @Reference
    private IUserInfoRedisService userInfoRedisService;

    //表示当前参数解析器,支持解析什么类型的方法参数
    @Override
    public boolean supportsParameter(MethodParameter methodParameter) {

        return methodParameter.getParameterType()== UserInfo.class
                &&methodParameter.hasParameterAnnotation(UserParam.class);
    }

    //如果上个方法返回true,表示需要执行的参数解析逻辑
    @Override
    public Object resolveArgument(
            MethodParameter methodParameter,
            ModelAndViewContainer modelAndViewContainer,
            NativeWebRequest nativeWebRequest,
            WebDataBinderFactory webDataBinderFactory) throws Exception {
        //获取当前登录用户的对象并返回,springMVC会自动注入userInfo参数对象中
        HttpServletRequest request = nativeWebRequest.getNativeRequest(HttpServletRequest.class);
        HttpServletResponse response = nativeWebRequest.getNativeResponse(HttpServletResponse.class);
        String token = CookieUtil.getToken(request, response);
        UserInfo userInfo = userInfoRedisService.getUserByToken(token);
        return userInfo;
    }
}
